/*
 * @Descripttion: 
 * @version: 
 * @Author: Addicated
 * @Date: 2020-11-18 13:19:40
 * @LastEditors: Addicated
 * @LastEditTime: 2020-11-18 13:26:47
 */
package com.adi.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {

    /**
     * MD5加密类
     * 
     * @param str 要加密的字符串
     * @return 加密后的字符串
     */
    public static String code(String str) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++) {
                i = byteDigest[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            // 32位加密
            return buf.toString();
            // 16位的加密
            // return buf.toString().substring(8, 24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }

    }

    public static void main(String[] args) {
        System.out.println(code("123456"));
    }
}
